Recycling method for the preparation and processing of a hydroxy

Details Recycling method for the preparation and processing of a hydroxy Recycling method for the preparation and processing of a hydroxy

1977-12-27

1978-10-24

Schwartz, Gerald A.

Chemistry of inorganic compounds

Nitrogen or compound thereof

Oxygen containing

260566A, C07C13104

Patent

active

041221532

ABSTRACT:
An improved process is described for the reduction of ammonium ions, while avoiding any increase in nitrate ion concentration, in a liquid stream recycled between a zone of synthesis of hydroxyl ammonium salt and a zone for synthesis of oxime, wherein the liquid stream is contacted with a gas stream consisting essentially of nitrogen monoxide and containing nitrogen dioxide at a pressure above 1 atmosphere, at a temperature of at least 80.degree. C., such that after the contact the molar NO.sub.2 /NO ratio of the gas stream is within the range of between about 10.sup.-1 to 10.sup.-4 :1.

REFERENCES:
patent: 3641150 (1972-02-01), De Rooij

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